Improved vertical windlasses



UNITED STATES PATENT OFFICE.

PETER H. JAoKsON, OE NEW YORK, N. Y.

IMPROVED vERTiCALwiNoL/xvsses.

Specification forming part of Letters Patent No. 36,006, dated July 29,1862.

To all whom, itam/ay concern:

Be it known that I, PETER H. JAcKsoN, of the city and State of New York,haveinvented, made, and applied to use a certain new and usefulImprovement in Vertical Windlasses; and I do hereby declare that thefollowing is a full, clear, and exact description of my said invention,reference being had to the annexed drawings, making part of thisspecification, wherein Figure lis a plan of my windlass, and Fig. 2 is avertical sectionv of the same.

Similar marks of reference denote the saine parts.

My invention is au improvement upon that for which Letters Patent weregranted to me April l, 1862; and it consists in an improved means forstopping` the chain-barrel, so as to cheek the chain as given out, orhold the same rigidly while the vessel is riding at anchor.

In the drawings, a is a cast-iron box containing a gear=wheel connectingthe shaft bito the gear-wheel o, Fig. 2, that is on a vertical stud, d,and saidV wheel c is provided with a long huh, receiving thepower-capstan e at its upper end, and below` the capstan e, between thatand the top of the box a, isl the chainwheel f, formed with indentationscorresponding to the chain to be acted on, and the capstan e andchain-wheel f are moved in either direction by a capstan or capstauheadapplied to the Vertical shaft b in the manner specified in my aforesaidLetters Patent, and the capstan e and chain-wheel f are connected toeach other, when desired, by keys 1 l, inserted in mortises formed bygrooves in the contiguous faces of the-wheelf and base of the capstan e,and said keys, when inserted, are held in place by pins 2 2, introducedthrough holes in the base of the capstan, as shown in Fig. 2.

My improved mechanism for stopping the chain-barrel consists of a fixedlug, t', cast on or affixed to the upper plate of the box a, and theshape and position of this lug is such that the chain-wheel f, whenmoving with the wheel c, does not touch against the same. On theopposite side of the chain-wheel to the said lug t is a friction-clamp,k, set to slide in a seat forrued in the top of the said box a, and abolt, 3, is provided, passing throu'gh a slot in said clamp to hold thesame down to its V place. The said clamp 7c has a mortise through it, asseen by dotted lines in Fig. l, and in this m'ortise an eccentric, o, isplaced, that is set on a pin or bolt, 4, and provided with alever-handle, Z, by which said eccentric can be revolved on the saidbolt 4, and by its action in the slot or mortise in the friction-clamp7c cause the end of said clamp to press tightly y against the edge ofthe chain-wheel f.

It will now be evident that if a slight play is left of the chain-wheelfon its hub the action of the friction-clamp will be to relieve said huband shaft from all strain, because the said clamp, acting on the sidewhere the chain cable passes away, receives the strain due to said chainand binds the wheel firmly by friction between the end of said clamp andthe block t, pressing the heaver away from the Shaft and preventing anymore chain running out until the said clamp is liberated. By this meansI am able to use my chain-wheel as a cablestopper, if necessary, andregulate the speed with which the chain is allowed 4to run out. If theend of the friction-clamp lo is formed with a projection taking adepression inthe edge of the chain-wheel, the stopping of thechain-wheel will be more sudden and reliable, although such a devicewill not gener ally be required.

The lever Z, that operates on the eccentric o, may be secured firmly inposition after the chain has been entirely stopped, so that the vesselcan ride at anchor with the chain cable around the chain-wheel withperfect safety.

rlhe end of the friction-clamp 7c should be inclined, as shown at 5, inorder that it may overhang the edge of the chain-wheel and tend to pressthe same down upon the upper surface of the'bo'x a and increase thefriction, and the lug i may be made also to overhang said edge in asimilar' manner, to keep the wheel down against the chain, if that isinclined upward.

Vhat I claim, and desire to secure by Let ters Patent, is

1. The friction-clamp lc, actuated by the ec centric o, in combinationwith the lug t', to clamp and arrest the movement of the wheelf,substantially as and for the purposes speci ed.

2. The overhanging end 5, in combination place, as seb forth.

2 36,006 s l* s with the clamp k, wheel f, and box a, as spee- InWitness whereof have hereunto set my ed, to press the said chain-wheelto the top signature this 17th of May, 1862. of the box a and increasethe friction, as set; forth. PETER H. JACKSON.

3. The pins 2, introduced through the base of the capstan e, and keys l,in combination VVibnesses: with the said beaver f, to hold said keys inLEMUEL W. SERRELL,

, CHARLES H. SMITH.

